Lathe-driver.



No. 853,273. PATENTED MAY 14, 1907.

1). H. TEAS.

LATHE DRIVER.

APPLICATION FILED 0012s, 1906.

llllllllll v mum ,L!) m, H 3w Witnesses: I Inventor Attorney I o I YiE NORRIS PETERS CD WKaHANGTA'IN. F1 I ma. W.

' UNITED STATES PATENT onnion- DANIEL H. TEAS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO NILES- BEMEN T-PON D COMPANY,

OF JERSEY CITY, NEW JERSEY.

LATHE-DRIVER.

Specification of Letters Patent.

Patented May 14, 1907.

To ctZt whom it may concern:

Be it known that I, DANIEL H. TEAS, a citizen of the United States, residing at New Haven, New Haven county, Connecticut, have invented certain new and useful Improvements in Lathe-Drivers, of which the following is a specification.

This invention pertains to that class of I lathe drivers which project from the face thickness ed to be bolted plate of the lathe and impinge against the face of the work, and it pertains to features of construction hereinafter set forth and particularly pointed out in the claims.

The invention will be readily understood from the following'description taken in connection with the accompanying drawing in which Figure 1 is a front elevation, Fig. 2 a vertical section, and Fig. 3 a plan of the improved driver.

In the drawing :1, indicates a plate adaptagainst the face plate of a lathe: 2, a rib preferably provided upon the back of the plate to cooperate with one of the grooves in the face plate: 3, holes through the plate for the bolts attaching the driver to the face plate: 4, an arm projecting outwardly from the plate: 5, a socket in the outer end of the arm, preferably segmental in cross section: 6, a block sliding in this socket and having its outer end serrated and for attachment to a projecting from the socket: 7. a port through the arm to the rear of the socket, the socket opening rearwardly into this port: 8, a cylindrical socket in the arm and plate to the rear of the being at right angles to the plate and substantially in line with the center of length and of block 6: 9, an interiorlythreaded bushing disposed in the cylindrical socket: 10, a locking screw engaging the plate and the bushing to prevent the rotation of the latter: and 11, a screw having its rear end threaded into the socket and having its forward end engaging against the rear of the serrated block and having a wrench-receiving portion accessible Within the port.

port in the arm, the axis of this socket The serrated block is to be made of hardened steel and its teeth, if given a rake as illustrated, should face in the proper direction for driving the work. It will be understood that in some lathes, double headed driving wheel lathes, for instance, the driving is done simultaneously from both face plates, and, in such case, the rake of the teeth of the block pertaining to one face plate would be in direction opposite that of the teeth of the block pertaining to the other face plate. In practice a given face plate would be provided with a plurality of these drivers arranged in circular series. The work having been placed in the lathe, and the driver having been secured to the face plate in such position, radially considered, that the block will come opposite the point in the work which it is to engage, the serrated block is forced outwardly against the work by adjusting the screw in an obvious manner. The heel thrust of the screw is borne by the heel end of the bushing bearing against the face plate. When the driver is removed from the face plate then the bushing and screw may be removed rearwardly, thus permitting the ready renewal of worn out screws or bushings.

I claim A lathe driver comprising a plate adapted face plate and provided with an outwardly extending arm having a port through it and having a socket extending from the port to the outer end of the arm, a block fitted to slide in said socket and having a serrated outer face, a screw carried by the arm to the rear of the port and having its forward end engaging the rear of the serrated block, and an interiorly threaded bushing engaging the screw andfitting a rearwardly open socket in the arm to the rear of the port, combined substane 

